Spacecraft attitude anomaly detection method and system

Abstract

The invention discloses a spacecraft attitude anomaly detection method and system. The method comprises the following steps: taking normal telemetry parameter sample data as a training set; establishing a PCA-LPP fusion dimension reduction reconstruction model through a fusion matrix; performing dimensionality reduction reconstruction on the training set based on the fusion model to obtain a fusion matrix, and obtaining the training model and dimensionality reduction reconstruction data according to the fusion matrix; calculating the variable quantity and the control limit of the training setin the dimension reduction reconstruction process according to the dimension reduction reconstruction data; performing dimensionality reduction reconstruction on a test set formed by the online telemetry data to be detected through the training model to obtain dimensionality reduction reconstruction data, and calculating the variable quantity of the test set in dimensionality reduction reconstruction; calculating the contribution rate of each telemetry parameter variable to the variable quantity of the test set when the variable quantity exceeds the control limit, and outputting the variable with the maximum contribution rate or exceeding the threshold value as an abnormal variable. The method is used for solving the problems of high calculation complexity, low detection accuracy and the like when facing high-dimensional multivariate complex spacecraft parameters in the prior art, reducing the calculation complexity and improving the detection accuracy.

Description

technical field [0001] The invention relates to the technical field of abnormal detection of spacecraft telemetry data, in particular to a method and system for detecting abnormality of telemetry data of a spacecraft attitude system based on dimensionality reduction and reconstruction. Background technique [0002] With the rapid development of aerospace technology, more and more satellites are launched into space to perform various tasks, such as navigation and positioning, meteorological observation and forecast, topographic and geological exploration, etc. The attitude control system is an important subsystem of the satellite. It mainly completes the orbit changing and orbiting tasks, including climbing and changing the orbital inclination to eliminate the static error of the attitude, make the satellite fly according to the predetermined attitude and orbit, and ensure the satellite to complete the flight and work. Task. Therefore, anomaly monitoring of the attitude cont...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a spacecraft attitude abnormal detection method and system, which are used to overcome the defects of high computational complexity and low detection accuracy in the face of high-dimensional multivariate and complex spacecraft parameters in the prior art. (PCA) and Manifold Learning (LPP) dimensionality reduction reconstruction to achieve a reasonable setting of dimensions, which can detect abnormalities more accurately

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